I can not save new object using JPA entity manager, please help

Question

I am using Spring 3 with JPA to access database, I tried to persist object, but failed. This is what I do:
1) Config:
     <tx:annotation-driven transaction-manager="txManager" proxy-target-class="true"/>
     <bean id="txManager"
          class="org.springframework.orm.jpa.JpaTransactionManager">
          <property name="entityManagerFactory" ref="emf" />
     </bean>
     <bean id="emf"
          class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean">
          <property name="dataSource" ref="dataSource" />
          <property name="jpaVendorAdapter" ref="jpaVendorAdapter" />
          <property name="loadTimeWeaver">
               <bean
                    class="org.springframework.instrument.classloading.InstrumentationLoadTimeWeaver" />
          </property>
          <property name="persistenceUnitName" value="memberPU"></property>
     </bean>
     <bean id="jpaVendorAdapter"
          class="org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter">
          <property name="database" value="MYSQL" />
          <property name="showSql" value="true" />
          <property name="generateDdl" value="false" />
          <property name="databasePlatform" value="org.hibernate.dialect.MySQL5InnoDBDialect" />
     </bean>
     <bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource"
          destroy-method="close">
          <property name="driverClassName" value="com.mysql.jdbc.Driver" />
          <property name="url"
               value="jdbc:mysql://localhost:3306/springinaction?createDatabaseIfNotExist\=true&amp;useUnicode\=true&amp;characterEncoding\=utf-8&amp;enableQueryTimeouts\=false" />
          <property name="username" value="root" />
          <property name="password" value="" />
          <property name="initialSize" value="5" />
          <property name="maxActive" value="10" />
     </bean>
2) Persistence.xml:
<persistence xmlns="http://java.sun.com/xml/ns/persistence"
     version="1.0">
     <persistence-unit name="memberPU" transaction-type="RESOURCE_LOCAL">
          <properties>
               <property name="hibernate.hbm2ddl.auto" value="validate" />
          </properties>
     </persistence-unit>
</persistence>
3) Domain:
@Entity
@Table(name = "members")
public class Spitter {
     @Id
     @Column(name = "id")
     @GeneratedValue(generator = "InvSeq")
     @SequenceGenerator(name = "InvSeq", sequenceName = "group table seq01", allocationSize = 5)
     private int id;
     @Column
     private String firstName;
     @Column
     private String lastName;
     @Column
     private int age;
gettters and setters...
4) Dao:
@Repository
@Transactional
public class SpitterDao {
     @PersistenceContext
     private EntityManager em;
public void addSpitter(Spitter spitter){
          Spitter s = new Spitter();
          //s.setId(null);
          s.setFirstName("Frank");
          s.setLastName("wqrewreqwr");
          s.setAge(45);
          System.out.print("Persisting into tDB here ");
          this.em.merge(s);
          this.em.persist(s);
          //this.em.flush();
          //this.em.getTransaction().commit();
If I do not call em.flush(), no error throws, and program is executed succesfully. BUT nothing is saved to DB. IF I used em.flush(), I got errormsg - "No Transaction", but the Dao is already annoted with @Transactional.
Reading through the JPA is no problem.
I tried different solutions heavily, but no result. Pleaes anyone point out what's the error and why object can not be serialized to DB.
Thanks very much

Answer 1

Hello,
You might try posting on a different forum (possibly a Spring forum) as this one is more specifically aimed at TopLink/EclipseLink which you are not using.
It appears the em is not associated to the transaction, but I can't suggest much other than point you at an EclipseLink Spring integration demo such as described here
http://www.vogella.de/java.html
or http://blog.springsource.org/2008/07/17/using-eclipselink-on-the-springsource-application-platform/
which might show settings that are missing or incorrect.
If you switched to using EclipseLink as the JPA provider i would suggest uploading the log file as that might detail how or why it is not being assocated to the transaction.
Best Regards,
Chris